I've only seen it on the internet, but Sterling Castle looks pretty cool too. And Loch Lomond I guess? It's famous from the song, at least, though if you've seen one lake... There's a number of interesting real locations related to Macbeth, if you're up for even more castles and ruins. Willie Wigglespike was not in it for the historical accuracy, but they're still pretty cool.
https://theculturetrip.com/europe/united...13-places/
https://theculturetrip.com/europe/united...13-places/